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--- old/usr/src/tools/smatch/src/symbol.h
+++ new/usr/src/tools/smatch/src/symbol.h
1 1 #ifndef SYMBOL_H
2 2 #define SYMBOL_H
3 3 /*
4 4 * Basic symbol and namespace definitions.
5 5 *
6 6 * Copyright (C) 2003 Transmeta Corp.
7 7 * 2003 Linus Torvalds
8 8 *
9 9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 10 * of this software and associated documentation files (the "Software"), to deal
11 11 * in the Software without restriction, including without limitation the rights
12 12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 13 * copies of the Software, and to permit persons to whom the Software is
14 14 * furnished to do so, subject to the following conditions:
15 15 *
16 16 * The above copyright notice and this permission notice shall be included in
17 17 * all copies or substantial portions of the Software.
18 18 *
19 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 25 * THE SOFTWARE.
26 26 */
27 27
28 28 #include "token.h"
29 29 #include "target.h"
30 30
31 31 /*
32 32 * An identifier with semantic meaning is a "symbol".
33 33 *
34 34 * There's a 1:n relationship: each symbol is always
35 35 * associated with one identifier, while each identifier
36 36 * can have one or more semantic meanings due to C scope
37 37 * rules.
38 38 *
39 39 * The progression is symbol -> token -> identifier. The
40 40 * token contains the information on where the symbol was
41 41 * declared.
42 42 */
43 43 enum namespace {
44 44 NS_NONE = 0,
45 45 NS_MACRO = 1,
46 46 NS_TYPEDEF = 2,
47 47 NS_STRUCT = 4, // Also used for unions and enums.
48 48 NS_LABEL = 8,
49 49 NS_SYMBOL = 16,
50 50 NS_ITERATOR = 32,
51 51 NS_PREPROCESSOR = 64,
52 52 NS_UNDEF = 128,
53 53 NS_KEYWORD = 256,
54 54 };
55 55
56 56 enum type {
57 57 SYM_UNINITIALIZED,
58 58 SYM_PREPROCESSOR,
59 59 SYM_BASETYPE,
60 60 SYM_NODE,
61 61 SYM_PTR,
62 62 SYM_FN,
63 63 SYM_ARRAY,
64 64 SYM_STRUCT,
65 65 SYM_UNION,
66 66 SYM_ENUM,
67 67 SYM_TYPEDEF,
68 68 SYM_TYPEOF,
69 69 SYM_MEMBER,
70 70 SYM_BITFIELD,
71 71 SYM_LABEL,
72 72 SYM_RESTRICT,
73 73 SYM_FOULED,
74 74 SYM_KEYWORD,
75 75 SYM_BAD,
76 76 };
77 77
78 78 enum keyword {
79 79 KW_SPECIFIER = 1 << 0,
80 80 KW_MODIFIER = 1 << 1,
81 81 KW_QUALIFIER = 1 << 2,
82 82 KW_ATTRIBUTE = 1 << 3,
83 83 KW_STATEMENT = 1 << 4,
84 84 KW_ASM = 1 << 5,
85 85 KW_MODE = 1 << 6,
86 86 KW_SHORT = 1 << 7,
87 87 KW_LONG = 1 << 8,
88 88 KW_EXACT = 1 << 9,
89 89 };
90 90
91 91 struct context {
92 92 struct expression *context;
93 93 unsigned int in, out;
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94 94 };
95 95
96 96 extern struct context *alloc_context(void);
97 97
98 98 DECLARE_PTR_LIST(context_list, struct context);
99 99
100 100 struct ctype {
101 101 unsigned long modifiers;
102 102 unsigned long alignment;
103 103 struct context_list *contexts;
104 - unsigned int as;
104 + struct ident *as;
105 105 struct symbol *base_type;
106 106 };
107 107
108 108 struct decl_state {
109 109 struct ctype ctype;
110 110 struct ident **ident;
111 111 struct symbol_op *mode;
112 112 unsigned char prefer_abstract, is_inline, storage_class, is_tls;
113 + unsigned char is_ext_visible;
113 114 };
114 115
115 116 struct symbol_op {
116 117 enum keyword type;
117 118 int (*evaluate)(struct expression *);
118 119 int (*expand)(struct expression *, int);
119 120 int (*args)(struct expression *);
120 121
121 122 /* keywords */
122 123 struct token *(*declarator)(struct token *token, struct decl_state *ctx);
123 124 struct token *(*statement)(struct token *token, struct statement *stmt);
124 125 struct token *(*toplevel)(struct token *token, struct symbol_list **list);
125 126 struct token *(*attribute)(struct token *token, struct symbol *attr, struct decl_state *ctx);
126 127 struct symbol *(*to_mode)(struct symbol *);
128 + void (*asm_modifier)(struct token *token, unsigned long *mods);
127 129
128 130 int test, set, class;
129 131 };
130 132
131 133
132 134 #define SYM_ATTR_WEAK 0
133 135 #define SYM_ATTR_NORMAL 1
134 136 #define SYM_ATTR_STRONG 2
135 137
136 138 struct symbol {
137 139 enum type type:8;
138 140 enum namespace namespace:9;
139 141 unsigned char used:1, attr:2, enum_member:1, bound:1;
140 142 struct position pos; /* Where this symbol was declared */
141 143 struct position endpos; /* Where this symbol ends*/
142 144 struct ident *ident; /* What identifier this symbol is associated with */
143 145 struct symbol *next_id; /* Next semantic symbol that shares this identifier */
144 146 struct symbol *replace; /* What is this symbol shadowed by in copy-expression */
145 147 struct scope *scope;
146 148 union {
147 149 struct symbol *same_symbol;
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148 150 struct symbol *next_subobject;
149 151 };
150 152
151 153 struct symbol_op *op;
152 154
153 155 union {
154 156 struct /* NS_MACRO */ {
155 157 struct token *expansion;
156 158 struct token *arglist;
157 159 struct scope *used_in;
160 + void (*expander)(struct token *);
158 161 };
159 162 struct /* NS_PREPROCESSOR */ {
160 163 int (*handler)(struct stream *, struct token **, struct token *);
161 164 int normal;
162 165 };
163 166 struct /* NS_SYMBOL */ {
164 167 unsigned long offset;
165 168 int bit_size;
166 169 unsigned int bit_offset:8,
167 - arg_count:10,
168 170 variadic:1,
169 171 initialized:1,
170 172 examined:1,
171 173 expanding:1,
172 174 evaluated:1,
173 175 string:1,
174 176 designated_init:1,
175 177 forced_arg:1,
178 + accessed:1,
179 + builtin:1,
180 + torename:1,
176 181 transparent_union:1;
177 182 struct expression *array_size;
178 183 struct ctype ctype;
179 184 struct symbol_list *arguments;
180 185 struct statement *stmt;
181 186 struct symbol_list *symbol_list;
182 187 struct statement *inline_stmt;
183 188 struct symbol_list *inline_symbol_list;
184 189 struct expression *initializer;
185 190 struct entrypoint *ep;
186 - long long value; /* Initial value */
187 191 struct symbol *definition;
188 192 };
189 193 };
190 194 union /* backend */ {
191 195 struct basic_block *bb_target; /* label */
192 196 void *aux; /* Auxiliary info, e.g. backend information */
193 197 struct { /* sparse ctags */
194 198 char kind;
195 199 unsigned char visited:1;
196 200 };
197 201 };
198 202 pseudo_t pseudo;
199 203 };
200 204
201 205 /* Modifiers */
202 -#define MOD_AUTO 0x0001
203 -#define MOD_REGISTER 0x0002
204 -#define MOD_STATIC 0x0004
205 -#define MOD_EXTERN 0x0008
206 +#define MOD_AUTO 0x00000001
207 +#define MOD_REGISTER 0x00000002
208 +#define MOD_STATIC 0x00000004
209 +#define MOD_EXTERN 0x00000008
210 +#define MOD_TOPLEVEL 0x00000010 // scoping..
211 +#define MOD_TLS 0x00000020
212 +#define MOD_ASM_GOTO MOD_TLS // never used together
213 +#define MOD_INLINE 0x00000040
206 214
207 -#define MOD_CONST 0x0010
208 -#define MOD_VOLATILE 0x0020
209 -#define MOD_SIGNED 0x0040
210 -#define MOD_UNSIGNED 0x0080
215 +#define MOD_ASSIGNED 0x00000080
216 +#define MOD_ADDRESSABLE 0x00000100
211 217
212 -#define MOD_CHAR 0x0100
213 -#define MOD_SHORT 0x0200
214 -#define MOD_LONG 0x0400
215 -#define MOD_LONGLONG 0x0800
216 -#define MOD_LONGLONGLONG 0x1000
217 -#define MOD_PURE 0x2000
218 +#define MOD_CONST 0x00000200
219 +#define MOD_VOLATILE 0x00000400
220 +#define MOD_RESTRICT 0x00000800
221 +#define MOD_ATOMIC 0x00001000
218 222
219 -#define MOD_TYPEDEF 0x10000
223 +#define MOD_SIGNED 0x00002000
224 +#define MOD_UNSIGNED 0x00004000
225 +#define MOD_EXPLICITLY_SIGNED 0x00008000
220 226
221 -#define MOD_TLS 0x20000
222 -#define MOD_INLINE 0x40000
223 -#define MOD_ADDRESSABLE 0x80000
227 +#define MOD_TYPE 0x00010000
228 +#define MOD_USERTYPE 0x00020000
229 +#define MOD_CHAR 0x00040000
230 +#define MOD_SHORT 0x00080000
231 +#define MOD_LONG 0x00100000
232 +#define MOD_LONGLONG 0x00200000
233 +#define MOD_LONGLONGLONG 0x00400000
224 234
225 -#define MOD_NOCAST 0x100000
226 -#define MOD_NODEREF 0x200000
227 -#define MOD_ACCESSED 0x400000
228 -#define MOD_TOPLEVEL 0x800000 // scoping..
235 +#define MOD_SAFE 0x00800000 // non-null/non-trapping pointer
236 +#define MOD_PURE 0x01000000
237 +#define MOD_BITWISE 0x02000000
238 +#define MOD_NOCAST 0x04000000
239 +#define MOD_NODEREF 0x08000000
240 +#define MOD_NORETURN 0x10000000
241 +#define MOD_EXT_VISIBLE 0x20000000
229 242
230 -#define MOD_ASSIGNED 0x2000000
231 -#define MOD_TYPE 0x4000000
232 -#define MOD_SAFE 0x8000000 // non-null/non-trapping pointer
233 243
234 -#define MOD_USERTYPE 0x10000000
235 -#define MOD_NORETURN 0x20000000
236 -#define MOD_EXPLICITLY_SIGNED 0x40000000
237 -#define MOD_BITWISE 0x80000000
238 -
239 -
244 +#define MOD_ACCESS (MOD_ASSIGNED | MOD_ADDRESSABLE)
240 245 #define MOD_NONLOCAL (MOD_EXTERN | MOD_TOPLEVEL)
241 246 #define MOD_STORAGE (MOD_AUTO | MOD_REGISTER | MOD_STATIC | MOD_EXTERN | MOD_INLINE | MOD_TOPLEVEL)
242 247 #define MOD_SIGNEDNESS (MOD_SIGNED | MOD_UNSIGNED | MOD_EXPLICITLY_SIGNED)
243 248 #define MOD_LONG_ALL (MOD_LONG | MOD_LONGLONG | MOD_LONGLONGLONG)
244 249 #define MOD_SPECIFIER (MOD_CHAR | MOD_SHORT | MOD_LONG_ALL | MOD_SIGNEDNESS)
245 250 #define MOD_SIZE (MOD_CHAR | MOD_SHORT | MOD_LONG_ALL)
246 -#define MOD_IGNORE (MOD_TOPLEVEL | MOD_STORAGE | MOD_ADDRESSABLE | \
247 - MOD_ASSIGNED | MOD_USERTYPE | MOD_ACCESSED | MOD_EXPLICITLY_SIGNED)
248 -#define MOD_PTRINHERIT (MOD_VOLATILE | MOD_CONST | MOD_NODEREF | MOD_NORETURN | MOD_NOCAST)
251 +#define MOD_IGNORE (MOD_STORAGE | MOD_ACCESS | MOD_USERTYPE | MOD_EXPLICITLY_SIGNED | MOD_EXT_VISIBLE)
252 +#define MOD_QUALIFIER (MOD_CONST | MOD_VOLATILE | MOD_RESTRICT | MOD_ATOMIC)
253 +#define MOD_PTRINHERIT (MOD_QUALIFIER | MOD_NODEREF | MOD_NORETURN | MOD_NOCAST)
249 254 /* modifiers preserved by typeof() operator */
250 -#define MOD_TYPEOF (MOD_VOLATILE | MOD_CONST | MOD_NOCAST | MOD_SPECIFIER)
255 +#define MOD_TYPEOF (MOD_QUALIFIER | MOD_NOCAST | MOD_SPECIFIER)
251 256
252 257
253 258 /* Current parsing/evaluation function */
254 259 extern struct symbol *current_fn;
255 260
256 261 /* Abstract types */
257 262 extern struct symbol int_type,
258 263 fp_type;
259 264
260 265 /* C types */
261 266 extern struct symbol bool_ctype, void_ctype, type_ctype,
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262 267 char_ctype, schar_ctype, uchar_ctype,
263 268 short_ctype, sshort_ctype, ushort_ctype,
264 269 int_ctype, sint_ctype, uint_ctype,
265 270 long_ctype, slong_ctype, ulong_ctype,
266 271 llong_ctype, sllong_ctype, ullong_ctype,
267 272 lllong_ctype, slllong_ctype, ulllong_ctype,
268 273 float_ctype, double_ctype, ldouble_ctype,
269 274 string_ctype, ptr_ctype, lazy_ptr_ctype,
270 275 incomplete_ctype, label_ctype, bad_ctype,
271 276 null_ctype;
277 +extern struct symbol int_ptr_ctype, uint_ptr_ctype;
278 +extern struct symbol long_ptr_ctype, ulong_ptr_ctype;
279 +extern struct symbol llong_ptr_ctype, ullong_ptr_ctype;
280 +extern struct symbol float32_ctype, float32x_ctype;
281 +extern struct symbol float64_ctype, float64x_ctype;
282 +extern struct symbol float128_ctype;
283 +extern struct symbol const_void_ctype, const_char_ctype;
284 +extern struct symbol const_ptr_ctype, const_string_ctype;
272 285
286 +#define uintptr_ctype size_t_ctype
287 +#define intptr_ctype ssize_t_ctype
288 +
273 289 /* Special internal symbols */
274 290 extern struct symbol zero_int;
275 291
276 292 #define __IDENT(n,str,res) \
277 293 extern struct ident n
278 294 #include "ident-list.h"
279 295
280 -#define symbol_is_typename(sym) ((sym)->type == SYM_TYPE)
281 296
282 297 extern struct symbol_list *translation_unit_used_list;
283 298
284 299 extern void access_symbol(struct symbol *);
285 300
286 301 extern const char * type_difference(struct ctype *c1, struct ctype *c2,
287 302 unsigned long mod1, unsigned long mod2);
288 303
289 304 extern struct symbol *lookup_symbol(struct ident *, enum namespace);
290 305 extern struct symbol *create_symbol(int stream, const char *name, int type, int namespace);
291 306 extern void init_symbols(void);
292 307 extern void init_builtins(int stream);
308 +extern void declare_builtins(void);
293 309 extern void init_ctype(void);
310 +extern void init_target(void);
294 311 extern struct symbol *alloc_symbol(struct position, int type);
295 312 extern void show_type(struct symbol *);
296 313 extern const char *modifier_string(unsigned long mod);
297 314 extern void show_symbol(struct symbol *);
298 315 extern int show_symbol_expr_init(struct symbol *sym);
299 316 extern void show_type_list(struct symbol *);
300 317 extern void show_symbol_list(struct symbol_list *, const char *);
301 318 extern void add_symbol(struct symbol_list **, struct symbol *);
302 319 extern void bind_symbol(struct symbol *, struct ident *, enum namespace);
303 320
304 321 extern struct symbol *examine_symbol_type(struct symbol *);
305 322 extern struct symbol *examine_pointer_target(struct symbol *);
306 -extern void examine_simple_symbol_type(struct symbol *);
323 +extern const char *show_as(struct ident *as);
307 324 extern const char *show_typename(struct symbol *sym);
308 325 extern const char *builtin_typename(struct symbol *sym);
326 +extern const char *builtin_type_suffix(struct symbol *sym);
309 327 extern const char *builtin_ctypename(struct ctype *ctype);
310 328 extern const char* get_type_name(enum type type);
311 329
312 330 extern void debug_symbol(struct symbol *);
313 331 extern void merge_type(struct symbol *sym, struct symbol *base_type);
314 332 extern void check_declaration(struct symbol *sym);
333 +extern void check_duplicates(struct symbol *sym);
315 334
335 +static inline int valid_type(const struct symbol *ctype)
336 +{
337 + return ctype && ctype != &bad_ctype;
338 +}
339 +
316 340 static inline struct symbol *get_base_type(const struct symbol *sym)
317 341 {
318 342 return examine_symbol_type(sym->ctype.base_type);
319 343 }
320 344
345 +///
346 +// test if type is an integer type
347 +//
348 +// @return: ``1`` for plain integer type, enums & bitfields
349 +// but ``0`` for bitwise types!
321 350 static inline int is_int_type(const struct symbol *type)
322 351 {
323 352 if (type->type == SYM_NODE)
324 353 type = type->ctype.base_type;
325 354 if (type->type == SYM_ENUM)
326 355 type = type->ctype.base_type;
327 356 return type->type == SYM_BITFIELD ||
328 357 type->ctype.base_type == &int_type;
329 358 }
330 359
331 360 static inline int is_enum_type(const struct symbol *type)
332 361 {
333 362 if (type->type == SYM_NODE)
334 363 type = type->ctype.base_type;
335 364 return (type->type == SYM_ENUM);
336 365 }
337 366
367 +static inline int is_signed_type(struct symbol *sym)
368 +{
369 + if (sym->type == SYM_NODE)
370 + sym = sym->ctype.base_type;
371 + if (sym->type == SYM_PTR)
372 + return 0;
373 + return !(sym->ctype.modifiers & MOD_UNSIGNED);
374 +}
375 +
338 376 static inline int is_type_type(struct symbol *type)
339 377 {
340 378 return (type->ctype.modifiers & MOD_TYPE) != 0;
341 379 }
342 380
343 381 static inline int is_ptr_type(struct symbol *type)
344 382 {
345 383 if (!type)
346 384 return 0;
347 385 if (type->type == SYM_NODE)
348 386 type = type->ctype.base_type;
349 387 return type->type == SYM_PTR || type->type == SYM_ARRAY || type->type == SYM_FN;
350 388 }
351 389
352 390 static inline int is_func_type(struct symbol *type)
353 391 {
354 392 if (type->type == SYM_NODE)
355 393 type = type->ctype.base_type;
356 394 return type->type == SYM_FN;
357 395 }
358 396
359 397 static inline int is_array_type(struct symbol *type)
360 398 {
361 399 if (type->type == SYM_NODE)
362 400 type = type->ctype.base_type;
363 401 return type->type == SYM_ARRAY;
364 402 }
365 403
366 404 static inline int is_float_type(struct symbol *type)
367 405 {
368 406 if (type->type == SYM_NODE)
369 407 type = type->ctype.base_type;
370 408 return type->ctype.base_type == &fp_type;
371 409 }
372 410
373 411 static inline int is_byte_type(struct symbol *type)
374 412 {
375 413 return type->bit_size == bits_in_char && type->type != SYM_BITFIELD;
376 414 }
377 415
378 416 static inline int is_void_type(struct symbol *type)
379 417 {
380 418 if (type->type == SYM_NODE)
381 419 type = type->ctype.base_type;
382 420 return type == &void_ctype;
383 421 }
384 422
385 423 static inline int is_bool_type(struct symbol *type)
386 424 {
387 425 if (type->type == SYM_NODE)
388 426 type = type->ctype.base_type;
389 427 return type == &bool_ctype;
390 428 }
391 429
392 430 static inline int is_scalar_type(struct symbol *type)
393 431 {
394 432 if (type->type == SYM_NODE)
395 433 type = type->ctype.base_type;
396 434 switch (type->type) {
397 435 case SYM_ENUM:
398 436 case SYM_BITFIELD:
399 437 case SYM_PTR:
400 438 case SYM_RESTRICT: // OK, always integer types
401 439 return 1;
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402 440 default:
403 441 break;
404 442 }
405 443 if (type->ctype.base_type == &int_type)
406 444 return 1;
407 445 if (type->ctype.base_type == &fp_type)
408 446 return 1;
409 447 return 0;
410 448 }
411 449
450 +/// return true for integer & pointer types
451 +static inline bool is_integral_type(struct symbol *type)
452 +{
453 + if (type->type == SYM_NODE)
454 + type = type->ctype.base_type;
455 + switch (type->type) {
456 + case SYM_ENUM:
457 + case SYM_PTR:
458 + case SYM_RESTRICT: // OK, always integer types
459 + return 1;
460 + default:
461 + break;
462 + }
463 + if (type->ctype.base_type == &int_type)
464 + return 1;
465 + return 0;
466 +}
467 +
412 468 static inline int is_function(struct symbol *type)
413 469 {
414 470 return type && type->type == SYM_FN;
415 471 }
416 472
417 473 static inline int is_extern_inline(struct symbol *sym)
418 474 {
419 475 return (sym->ctype.modifiers & MOD_EXTERN) &&
420 476 (sym->ctype.modifiers & MOD_INLINE) &&
421 477 is_function(sym->ctype.base_type);
422 478 }
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423 479
424 480 static inline int get_sym_type(struct symbol *type)
425 481 {
426 482 if (type->type == SYM_NODE)
427 483 type = type->ctype.base_type;
428 484 if (type->type == SYM_ENUM)
429 485 type = type->ctype.base_type;
430 486 return type->type;
431 487 }
432 488
489 +static inline long long extend_value(long long val, struct symbol *ctype)
490 +{
491 + int is_signed = !(ctype->ctype.modifiers & MOD_UNSIGNED);
492 + unsigned size = ctype->bit_size;
493 +
494 + return bits_extend(val, size, is_signed);
495 +}
496 +
433 497 static inline struct symbol *lookup_keyword(struct ident *ident, enum namespace ns)
434 498 {
435 499 if (!ident->keyword)
436 500 return NULL;
437 501 return lookup_symbol(ident, ns);
438 502 }
439 503
440 504 #define is_restricted_type(type) (get_sym_type(type) == SYM_RESTRICT)
441 505 #define is_fouled_type(type) (get_sym_type(type) == SYM_FOULED)
442 506 #define is_bitfield_type(type) (get_sym_type(type) == SYM_BITFIELD)
443 -extern int is_ptr_type(struct symbol *);
444 507
445 508 void create_fouled(struct symbol *type);
446 509 struct symbol *befoul(struct symbol *type);
447 510
511 +
512 +extern struct ident bad_address_space;
513 +
514 +static inline bool valid_as(struct ident *as)
515 +{
516 + return as && as != &bad_address_space;
517 +}
518 +
519 +static inline void combine_address_space(struct position pos,
520 + struct ident **tas, struct ident *sas)
521 +{
522 + struct ident *as;
523 + if (!sas)
524 + return;
525 + as = *tas;
526 + if (!as)
527 + *tas = sas;
528 + else if (as != sas) {
529 + *tas = &bad_address_space;
530 + sparse_error(pos, "multiple address spaces given");
531 + }
532 +}
533 +
448 534 #endif /* SYMBOL_H */
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